Plasma-sprayed TiO2 coatings: Hydrophobicity enhanced by ZnO additions

Yusuf, Yusliza and Ghazali, Mariyam Jameelah and Mohamad Juoi, Jariah and Abd Rahim, Toibah and Mustafa, Zaleha (2022) Plasma-sprayed TiO2 coatings: Hydrophobicity enhanced by ZnO additions. International Journal of Applied Ceramic Technology, 19 (4). pp. 2213-2221. ISSN 1546-542X

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Abstract

Titanium dioxide (TiO2) powder mixed individually with 10 and 30 weight percentage (wt%) ZnO was thermally sprayed onto a grade B API 5 L carbon steel substrate by atmospheric plasma spraying. The effect of the addition of ZnO (10 wt% and 30 wt%) on the microstructures and wettability properties of the TiO2/ZnO coatings was investigated. The characterization of the coatings was carried out using scanning electron microscopy, X-ray diffraction (XRD), laser confocal microscope, and sessile droplet system. The XRD analysis of the coat�ing revealed that the anatase phase of TiO2 in the powder state transformed into rutile phases for the produced TiO2/ZnO coatings. Surface microstruc�ture analysis revealed that the coatings had typical micro-roughened surfaces of plasma spraying products. The coating with 30 wt% ZnO produced a coating with remarkable pores and microcracks compared with the TiO2 coating and coating with 10 wt% ZnO. Additionally, the increase in the wt% of ZnO increased the surface roughness value of the produced coatings and substantially changed the wettability properties of the TiO2 coating from hydrophilic to hydrophobic.

Item Type:	Article
Uncontrolled Keywords:	TiO2/ZnO coating, wettability properties
Divisions:	Faculty of Mechanical and Manufacturing Engineering Technology
Depositing User:	Norfaradilla Idayu Ab. Ghafar
Date Deposited:	06 Mar 2023 12:43
Last Modified:	06 Mar 2023 12:43
URI:	http://eprints.utem.edu.my/id/eprint/26377
Statistic Details:	View Download Statistic

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